极固宁对水门汀与牙本质间剪切强度的影响

目的：评价极固宁脱敏剂对5种水门汀剪切强度的影响。方法：收集双尖牙30颗。包埋牙齿,暴露牙本质面,用水砂纸打磨牙本质面。所有牙齿被分为实验组和对照组。实验组的牙本质面首先用极固宁脱敏处理,然后分别用5种水门汀将树脂小柱粘在牙本质表面。对照组的牙本质不涂脱敏剂,使用前述提到的水门汀粘固树脂小柱。所有试样放在37℃水浴中浸泡24h后测量剪切强度。结果：极固宁脱敏剂没有显著降低聚羧酸锌水门汀和玻璃离子水门汀的剪切强度,但却会使磷酸锌水门汀的剪切强度大幅下降。极固宁也使树脂加强玻璃离子水门汀和树脂水门汀的粘接强度下降。结论：极固宁对磷酸锌水门汀、树脂加强玻璃离子水门汀、树脂水门汀与牙本质间粘接强度有不利影响,对聚羧酸锌水门汀和玻璃离子水门汀与牙本质间粘接强度无不利影响。

Effect of Green Or Desensitizer on Shear Bond Strength of Adhesive Agents to Dentin

Objective： To investigate the effect of Green Or desensitizer on shear bond strength of five adhesive agents to dentin.Methods： Thirty human premolars were used.Dentin surfaces were ground with silicon carbide abrasive papers.Teeth were randomly divided into two groups： the tested group and the control group.For the tested group,dentin surfaces were treated with Green Or desensitizer,then Solidex cylinders were positioned over the dentin surface with five cements respectively.For the control group,no desensitizer was applied,resin cylinders were bonded with cements mentioned above.Shear bond strengths were detemined.Results： The results indicate that Green Or desensitizer-treated dentin did not affect the shear bond strength of glass ionomer or polycarboxylate cements,but produced a large decrease in the shear bond strength of zinc phosphate.For resin-forced glass ionomer and resin luting agents,the application of Green Or desensitizer significantly reduced the shear bond strength of both materials.Conclusion： Green Or desensitizer could reduce the shear bond strength of zinc phosphate,resin-modified glass ionomer and resin luting agents.Green Or desensitizer had no effect on polycarboxylate and glass ionomer.